Improved XML style comment parsing

src/AST/Comment.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 
 namespace CppSharp.AST
 {
@@ -409,10 +410,17 @@ namespace CppSharp.AST
         {
             public string Name;
             public string Value;
+
+            public override string ToString()
+            {
+                return $"{Name}=\"{Value}\"";
+            }
         }
 
         public List<Attribute> Attributes;
 
+        public bool SelfClosing { get; set; }
+
         public HTMLStartTagComment()
         {
             Kind = DocumentationCommentKind.HTMLStartTagComment;
@@ -423,6 +431,15 @@ namespace CppSharp.AST
         {
             visitor.VisitHTMLStartTag(this);
         }
+
+        public override string ToString()
+        {
+            var attrStr = string.Empty;
+            if (Attributes.Count != 0)
+                attrStr = " " + string.Join(' ', Attributes.Select(x => x.ToString()));
+
+            return $"<{TagName}{attrStr}{(SelfClosing ? "/" : "")}>";
+        }
     }
 
     /// <summary>
@@ -439,6 +456,11 @@ namespace CppSharp.AST
         {
             visitor.VisitHTMLEndTag(this);
         }
+
+        public override string ToString()
+        {
+            return $"</{TagName}>";
+        }
     }
 
     /// <summary>
@@ -457,6 +479,13 @@ namespace CppSharp.AST
         {
             visitor.VisitText(this);
         }
+
+        public override string ToString()
+        {
+            return Text;
+        }
+
+        public bool IsEmpty => string.IsNullOrEmpty(Text) && !HasTrailingNewline;
     }
 
     /// <summary>

src/Generator.Tests/Passes/TestPasses.cs

@@ -123,10 +123,12 @@ namespace CppSharp.Generator.Tests.Passes
         [Test]
         public void TestCleanCommentsPass()
         {
-            var c = AstContext.FindClass("TestCommentsPass").FirstOrDefault();
+            var c = AstContext.Class("TestCommentsPass");
+            var c2 = AstContext.Class("TestCommentsPass2");
 
             passBuilder.AddPass(new CleanCommentsPass());
             passBuilder.RunPasses(pass => pass.VisitDeclaration(c));
+            passBuilder.RunPasses(pass => pass.VisitClassDecl(c2));
 
             var para = (ParagraphComment)c.Comment.FullComment.Blocks[0];
             var textGenerator = new TextGenerator();
@@ -134,6 +136,25 @@ namespace CppSharp.Generator.Tests.Passes
 
             Assert.That(textGenerator.StringBuilder.ToString().Trim(),
                 Is.EqualTo("/// <summary>A simple test.</summary>"));
+
+            var textGenerator2 = new TextGenerator();
+            textGenerator2.Print(c2.Methods[0].Comment.FullComment, CommentKind.BCPLSlash);
+
+            Assert.That(textGenerator2.StringBuilder.ToString().Trim(),
+                Is.EqualTo(
+                    "/// <summary>Gets a value</summary>\n" +
+                            "/// <returns>One</returns>"
+                        ));
+
+            var textGenerator3 = new TextGenerator();
+            textGenerator3.Print(c2.Methods[1].Comment.FullComment, CommentKind.BCPLSlash);
+
+            Assert.That(textGenerator3.StringBuilder.ToString().Trim(),
+                Is.EqualTo(
+                    "/// <summary>Sets a value. Get it with <see cref=\"GetValueWithComment\"/></summary>\n" +
+                            "/// <param name=\"value\">The value to set</param>\n" +
+                            "/// <returns>The parameter (typeof<float>)</returns>"
+                        ));
         }
 
         [Test]

src/Generator/Generators/CSharp/CSharpCommentPrinter.cs

@@ -37,6 +37,7 @@ namespace CppSharp.Generators.CSharp
                     switch (blockCommandComment.CommandKind)
                     {
                         case CommentCommandKind.Brief:
+                            sections.Add(new Section(CommentElement.Summary));
                             blockCommandComment.ParagraphComment.GetCommentSections(sections);
                             break;
                         case CommentCommandKind.Return:
@@ -85,14 +86,23 @@ namespace CppSharp.Generators.CSharp
                     break;
                 }
                 case DocumentationCommentKind.ParagraphComment:
-                    var summaryParagraph = sections.Count == 1;
-                    var paragraphComment = (ParagraphComment)comment;
+                {
+                    bool summaryParagraph = false;
+                    if (sections.Count == 0)
+                    {
+                        sections.Add(new Section(CommentElement.Summary));
+                        summaryParagraph = true;
+                    }
+
                     var lastParagraphSection = sections.Last();
+                    var paragraphComment = (ParagraphComment)comment;
                     foreach (var inlineContentComment in paragraphComment.Content)
                     {
                         inlineContentComment.GetCommentSections(sections);
                         if (inlineContentComment.HasTrailingNewline)
                             lastParagraphSection.NewLine();
+
+                        lastParagraphSection = sections.Last();
                     }
 
                     if (!string.IsNullOrEmpty(lastParagraphSection.CurrentLine.ToString()))
@@ -132,10 +142,33 @@ namespace CppSharp.Generators.CSharp
                 }
                 case DocumentationCommentKind.HTMLStartTagComment:
                 {
+                    var startTag = (HTMLStartTagComment)comment;
+                    var sectionType = CommentElementFromTag(startTag.TagName);
+
+                    if (IsInlineCommentElement(sectionType))
+                    {
+                        var lastSection = sections.Last();
+                        lastSection.CurrentLine.Append(startTag);
+                        break;
+                    }
+
+                    sections.Add(new Section(sectionType)
+                    {
+                        Attributes = startTag.Attributes.Select(a => a.ToString()).ToList()
+                    });
                     break;
                 }
                 case DocumentationCommentKind.HTMLEndTagComment:
                 {
+                    var endTag = (HTMLEndTagComment)comment;
+                    var sectionType = CommentElementFromTag(endTag.TagName);
+
+                    if (IsInlineCommentElement(sectionType))
+                    {
+                        var lastSection = sections.Last();
+                        lastSection.CurrentLine.Append(endTag);
+                    }
+
                     break;
                 }
                 case DocumentationCommentKind.HTMLTagComment:
@@ -252,15 +285,71 @@ namespace CppSharp.Generators.CSharp
             }
         }
 
+        private static CommentElement CommentElementFromTag(string tag)
+        {
+            return tag.ToLowerInvariant() switch
+            {
+                "c" => CommentElement.C,
+                "code" => CommentElement.Code,
+                "example" => CommentElement.Example,
+                "exception" => CommentElement.Exception,
+                "include" => CommentElement.Include,
+                "list" => CommentElement.List,
+                "para" => CommentElement.Para,
+                "param" => CommentElement.Param,
+                "paramref" => CommentElement.ParamRef,
+                "permission" => CommentElement.Permission,
+                "remarks" => CommentElement.Remarks,
+                "return" or "returns" => CommentElement.Returns,
+                "summary" => CommentElement.Summary,
+                "typeparam" => CommentElement.TypeParam,
+                "typeparamref" => CommentElement.TypeParamRef,
+                "value" => CommentElement.Value,
+                "seealso" => CommentElement.SeeAlso,
+                "see" => CommentElement.See,
+                "inheritdoc" => CommentElement.InheritDoc,
+                _ => CommentElement.Unknown
+            };
+        }
+
+        /// <summary>From https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/language-specification/documentation-comments#d3-recommended-tags</summary>
+        /// <remarks>Enum value is equal to sorting priority</remarks>
         private enum CommentElement
         {
-            Summary,
-            Typeparam,
-            Param,
-            Returns,
-            Exception,
-            Remarks,
-            Example
+            C = 1000,               // Set text in a code-like font
+            Code = 1001,            // Set one or more lines of source code or program output
+            Example = 11,           // Indicate an example
+            Exception = 8,          // Identifies the exceptions a method can throw
+            Include = 1,            // Includes XML from an external file
+            List = 1002,            // Create a list or table
+            Para = 1003,            // Permit structure to be added to text
+            Param = 5,              // Describe a parameter for a method or constructor
+            ParamRef = 1004,        // Identify that a word is a parameter name
+            Permission = 7,         // Document the security accessibility of a member
+            Remarks = 9,            // Describe additional information about a type
+            Returns = 6,            // Describe the return value of a method
+            See = 1005,             // Specify a link
+            SeeAlso = 10,           // Generate a See Also entry
+            Summary = 2,            // Describe a type or a member of a type
+            TypeParam = 4,          // Describe a type parameter for a generic type or method
+            TypeParamRef = 1006,    // Identify that a word is a type parameter name
+            Value = 3,              // Describe a property
+            InheritDoc = 0,         // Inherit documentation from a base class
+            Unknown = 9999,         // Unknown tag
         }
+
+        private static bool IsInlineCommentElement(CommentElement element) =>
+            element switch
+            {
+                CommentElement.C => true,
+                CommentElement.Code => true,
+                CommentElement.List => true,
+                CommentElement.Para => true,
+                CommentElement.ParamRef => true,
+                CommentElement.See => true,
+                CommentElement.TypeParamRef => true,
+                CommentElement.Unknown => true, // Print unknown tags as inline
+                _ => ((int)element) >= 1000
+            };
     }
 }

src/Generator/Passes/CleanCommentsPass.cs

@@ -7,10 +7,6 @@ namespace CppSharp.Passes
 {
     public class CleanCommentsPass : TranslationUnitPass, ICommentVisitor<bool>
     {
-        public CleanCommentsPass() => VisitOptions.ResetFlags(
-            VisitFlags.ClassBases | VisitFlags.FunctionReturnType |
-            VisitFlags.TemplateArguments);
-
         public bool VisitBlockCommand(BlockCommandComment comment) => true;
 
         public override bool VisitParameterDecl(Parameter parameter) =>
@@ -46,25 +42,92 @@ namespace CppSharp.Passes
 
         public bool VisitParagraph(ParagraphComment comment)
         {
-            for (int i = 0; i < comment.Content.Count; i++)
+            // Fix clang parsing html tags as TextComment's
+            var textComments = comment.Content
+                .Where(c => c.Kind == DocumentationCommentKind.TextComment)
+                .Cast<TextComment>()
+                .ToArray();
+
+            for (var i = 0; i < textComments.Length; ++i)
             {
-                if (comment.Content[i].Kind == DocumentationCommentKind.InlineCommandComment &&
-                    i + 1 < comment.Content.Count &&
-                    comment.Content[i + 1].Kind == DocumentationCommentKind.TextComment)
+                TextComment textComment = textComments[i];
+                if (textComment.IsEmpty)
+                {
+                    comment.Content.Remove(textComment);
+                    continue;
+                }
+
+                if (!textComment.Text.StartsWith('<'))
+                    continue;
+
+                if (textComment.Text.Length < 2 || i + 1 >= textComments.Length)
+                    continue;
+
+                bool isEndTag = textComment.Text[1] == '/';
+
+                // Replace the TextComment node with a HTMLTagComment node
+                HTMLTagComment htmlTag = isEndTag ? new HTMLEndTagComment() : new HTMLStartTagComment();
+                htmlTag.TagName = textComment.Text[(1 + (isEndTag ? 1 : 0))..];
+
+                // Cleanup next element
+                TextComment next = textComments[i + 1];
+                int tagEnd = next.Text.IndexOf('>');
+                if (tagEnd == -1)
+                    continue;
+
+                if (!isEndTag)
                 {
-                    var textComment = (TextComment)comment.Content[i + 1];
-                    textComment.Text = Helpers.RegexCommentCommandLeftover.Replace(
-                        textComment.Text, string.Empty);
+                    var startTag = (htmlTag as HTMLStartTagComment)!;
+                    var tagRemains = next.Text[..tagEnd];
+
+                    if (tagRemains.EndsWith('/'))
+                    {
+                        startTag.SelfClosing = true;
+                        tagRemains = tagRemains[..^1];
+                    }
+
+                    var attributes = tagRemains.Split(' ', StringSplitOptions.RemoveEmptyEntries);
+                    foreach (var attribute in attributes)
+                    {
+                        var args = attribute.Split('=');
+                        startTag.Attributes.Add(new HTMLStartTagComment.Attribute
+                        {
+                            Name = args[0].Trim(),
+                            Value = args.ElementAtOrDefault(1)?.Trim(' ', '"'),
+                        });
+                    }
                 }
+
+                // Strip tagRemains from next element
+                next.Text = next.Text[(tagEnd + 1)..];
+
+                if (string.IsNullOrEmpty(next.Text))
+                {
+                    htmlTag.HasTrailingNewline = next.HasTrailingNewline;
+                    comment.Content.Remove(next);
+                }
+
+                //  Replace element
+                var insertPos = comment.Content.IndexOf(textComment);
+                comment.Content.RemoveAt(insertPos);
+                comment.Content.Insert(insertPos, htmlTag);
             }
-            foreach (var item in comment.Content.Where(c => c.Kind == DocumentationCommentKind.TextComment))
+
+            for (int i = 0; i < comment.Content.Count; i++)
             {
-                var textComment = (TextComment)item;
+                if (comment.Content[i].Kind != DocumentationCommentKind.InlineCommandComment)
+                    continue;
+
+                if (i + 1 >= comment.Content.Count)
+                    continue;
+
+                if (comment.Content[i + 1].Kind != DocumentationCommentKind.TextComment)
+                    continue;
+
 
-                if (textComment.Text.StartsWith("<", StringComparison.Ordinal))
-                    textComment.Text = $"{textComment.Text}>";
-                else if (textComment.Text.StartsWith(">", StringComparison.Ordinal))
-                    textComment.Text = textComment.Text.Substring(1);
+                var textComment = (TextComment)comment.Content[i + 1];
+                textComment.Text = Helpers.RegexCommentCommandLeftover.Replace(
+                    textComment.Text, string.Empty);
             }
             return true;
         }

tests/dotnet/Native/Passes.h

@@ -45,6 +45,43 @@ class TestCommentsPass
 {
 };
 
+/// <summary>A more complex test.</summary>
+class TestCommentsPass2
+{
+public:
+    /// <summary>Gets a value</summary>
+    /// <returns>One</returns>
+    float GetValueWithComment()
+    {
+        return 1.0f;
+    }
+
+    /// <summary>Sets a value. Get it with <see cref="GetValueWithComment"/></summary>
+    /// <param name="value">The value to set</param>
+    /// <returns>The parameter (typeof<float>)</returns>
+    float SetValueWithParamComment(float value)
+    {
+        return value;
+    }
+
+    /// <summary>
+    /// This method changes the point's location by
+    /// the given x- and y-offsets.
+    /// For example:
+    /// <code>
+    /// Point p = new Point(3, 5);
+    /// p.Translate(-1, 3);
+    /// </code>
+    /// results in <c>p</c>'s having the value (2, 8).
+    /// <see cref="Move"/>
+    /// </summary>
+    /// <param name="dx">The relative x-offset.</param>
+    /// <param name="dy">The relative y-offset.</param>
+    void Translate(int dx, int dy)
+    {
+    }
+};
+
 struct TestReadOnlyProperties
 {
     int readOnlyProperty;